Sictioixal  deksick leg claxcp



June 12, 1928.

W. F. SPEAKMAN ET AL SEGTIONAL DERRICK LEG CLAMP.

Original Filed Ju ly 14, 1926 Reissued June 12, 1928.

" UNITED, STATES WALTER F. srnnxnrhn AND GUY n onooxn'rr, or nnunnienm;OKLAHOMA.

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ori inal No. 1,616,995,datedilebruary a, 1927, Serial noglaacoc,filedlnly in -19m. Application for reissue filed August 25, 1937.,Serial. No. 215,490,

, i This invention relates generally to well derricksvand hasmore'particular reference to aiclamp for the sectional legs of thederrick, the primary objectof the invention residing in the provision'ofsuch aclamp wherein the adjacentends of the leg sections are positivelyinterconnected. Freqgently the, dropping. of heavy tools from t e top ofa tall derrick causes av re- .bound of the derrick which sometimes jumpsthe leg sections, out of the generally used clamps causing the derrickto collapse. Wind storms often sway; derrieks and spring them in such amanner as to cause the legsections; to be drawnout of the clamps andvthe entire derrick to collapse. Through the medium of the presenttypeofv clamp, these hazards are eliminated, and conse Other objects willbecome-apparent asthe naturelof the invention willbe better understood,the same comprising the novel form, combination, and arrangement ofparts claimed. 1.

In the drawing several views:

Figure 1 is a fragmentary elevation of a Well derrick, the leg sectionsthereof being interconnected by reason of a clamp constructed inaccordance withthe present invention,

u) Figure 2 is a fragmentary view of a pair of derricklcg sectionsarrangedv in end to end relation, said ends being so constructed as topermit the use of the clamp of the present type. 1

Figure 3 is an enlarged detail longitudinal section takensubstant-iallyupon the line 33 of Figure 1 and looking downwardly in the direction ofthe arrows for disclosing the present clamp in upper end elevation.

Figure 4 is an enlarged detail section hereinafter more fully described,m shown in the accompanying drawing and wherein like referencecharacters indicatelike parts throughout the.

is a perspective of atsectional shim, ,aypair of, which are, employed aselements of the present invention.

F gure-,Sis alongitudin-al sect onal view taken, on substantiallIl-DGVIL VIOIE Figure 3, with vparts-in e evation. w 1

As is well know mthelegs of, metallic derrick constructions are madeup'yof tubular sections interconnected inend. to end relation; and thisby reason of a large variety of clamps-now in use. In the drawing thepair of leg sections. disclosed are designated 5-+5 and inaccordancewith lily-invention,

the ends of these sections are circumferentially flanged as at 66. Theclamp per,- se constitutes the revision of, a pair of tubular metallicshims 7, eachv-ofywhich is ofhalf section formation as disclosed inFigure 5,

said shims being arranged overthe tubular. leg sections 5--5 directlywithin the flanges 6 thereof as illustratedbythedotted lines .inFigural. At one edgeof each ofthe shim sections and atthe outer. endthereof,

the same. is formedwith an outwardly ex tending .lateralear 8 formedwith anopening 9,. h ee-1 ears being vpreferably formed by cutting thematerialinia horizontal manner and. a predetermined distance towards thecenter of each seetionand thenbending the same outwardly, whichrisofcourse an obvious expedient y The clamp further consists of a metallictube 10 formed throughout its length with an opening'substantiallyequivalent to one fourth of the circumference thereof so as to permitthe disposition of the tube over the shims 7-7 upon the sections of thederrick leg, after which an insert 11 is arranged within the opening.

The vertical edges of the tube 10 as well as the insert 11 are formedwith lateral flanges 10 and 11' respectively, to facilitate their rigidconnection by reason of bolts 12 and nuts 13 as clearly disclosed inFigures .1, 3-, 4 and 6, said flanges being provided with pre-arrangedopenings for this purpose.

The ears 8 of the shim sections will be disposed between these flangesand be se- 14 of the derrick construction will be arranged at their endsbetweenthe flanges of 1 derrick construction as heretofore mentioned.

said] shims.

Having thus described the invention, what we claim as new and desire tosecure by .Let-

ters Patentis:- I v v I 1. In a clamp for sectional derrick legs whereinthe ends of the'sections are provided with circumferential flanges,shims disposed around the ends of the'sections directly in backof saidflanges, a tube arranged over said shims and means for positivelyinterconnectin said tube and said shims.

V 2. In a c amp for'sectiona-l derrick'le'gs whereinthe ends thereof areprovided with lateral abutments, shims mounted upon the ends of thesections directly in back of said abutments, a tube arranged over theshims and means positively connecting the :tube to 3. In aclamp' forsectional derrick legs wherein the ends of the sections are providedwith lateral a'bu'tments, shims disposed upon the endsof the sections inback of said abutments, a tube arranged over the shims and complementaryconstruction between the shims and tube whereb I thesamemay bepositivelyinterconnecte 4. In a' clamp for sectional "derrick legs 1wherein the ends of the sections are provided with lateral abutments,sectional metallic 1 shim arranged overthe ends of the leg sectionsdirectly in back of said abutments, a sectional tube arranged over theshims and complementary construction between the tube sections and saidshin' sections whereby the shims may be positively secured to said tube.v

5.'In a clamp for sectional derrick legs wherein the ends of thesections are provided with lateral abutments, shims disposed around theends of the sections directly in backoof the abutments, a sectional tubearranged over the pair of shims, and positive connections betweenthe-shims and the sections of the tube. 1

wherein the ends of'the's'ections are provided with lateral abutments,sectional shims disposed around the ends of the sections directly inback-of the abutments, a sectional tube'arranged over the pairof shims,and means formed integ'ralwiththe shim-sections, and tube sectionswhereby said shim and tube'se'ctions may be positively i t connected. aa I 7. 'A clamp for sectional'derrick legs,-comprising sectional shimsadapted to be secured infifixed relation upon respective abutting endsof a sectional derrick leg, a sectional tube arranged over said shims,said slums and tube being formed with "cooperating flanges and means forsecuring said shims to said'tube through said flanges. 1

8. A clamp for sectional'derrick legs,'-comprising shims adapted to besecuredin fixed relation upon respective abutting ends of'a sectionalderrick leg, a tubular member overlapping said shims, said shims andtubular .member being formed with cooperating flanges andmeans-forsecuring said shims to said tubular member through saidflange-s.

In* testimony whereof, we have hereunto subscribed our names at Tulsa,Tulsa County,

Oklahoma.

- WALTER F. SPEAKMANJV GUYYE. CRQOKETT.

6. In a clamp for sectional derrick legs

